UBC 307
0.63
UTI
0.77
CN
1.0
Cdens
1.0
CC3
0.19
Clit
1.0
Cdup
Nm (P>50%)
143
Core radius and density
1.0 [pc], 7.4 [pc-2]
- CN 0.77 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.19 Rarely studied
- Cdup 1.0 Unique
đĨ Members
đ Colab
đŦ Bayestar19
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
Overview
UBC 307 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.
Note: This object contains blue stragglers according to at least one source.
Note: This object shares a moderate percentage of members with a later reported entry. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 239.412 | -57.267 | 0.332 | -2.007 | -2.645 | -16.19 |
| Hu & Soubiran | 2025 | 239.418 | -57.254 | â | â | â | â |
| Hunt & Reffert | 2024 | 239.416 | -57.271 | 0.324 | -2.017 | -2.654 | -21.999 |
| Cavallo et al. | 2024 | 239.418 | -57.254 | 0.327 | â | â | â |
| Hunt & Reffert | 2023 | 239.416 | -57.271 | 0.324 | -2.017 | -2.654 | -21.999 |
| Jadhav & Subramaniam | 2021 | 239.415 | -57.265 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 239.415 | -57.265 | 0.321 | -1.999 | -2.644 | â |
| Castro-Ginard et al. | 2020 | 239.429 | -57.26 | 0.327 | -2.003 | -2.631 | â |
đĄ Note: The UCC values are estimated from its identified members.
| Reference | Year | Dist [kpc] | Av [mag] | DAv [mag] | Age [Myr] | [Fe/H] [dex] | Mass [Msun] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 2.75 | 1.8 | 1.26 | 868 | -0.070 | 1279 | â | 1 |
| Hu & Soubiran | 2025 | â | â | â | â | -0.130(5) | â | â | â |
| Hunt & Reffert | 2024 | 2.76 | 1.84 | 1.26 | 460 | â | 1686(1) | â | â |
| Cavallo et al. | 2024 | 2.19 | 1.76 | â | 1175 | -0.010 | â | â | â |
| Hunt & Reffert | 2023 | 2.76 | 1.84 | 1.26 | 460 | â | â | â | â |
| Jadhav & Subramaniam | 2021 | 2.74 | 1.39 | â | 1148 | â | 872 | â | 1(1) |
| Cantat-Gaudin et al. | 2020 | 2.74 | 1.39 | â | 1148 | â | â | â | â |
| Kounkel et al. | 2020 | 2.97 | 2.57 | â | 589 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).